Generelle Ausnahmenanzeige

PrototypChat/App.xaml

@@ -2,6 +2,7 @@
              xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
              xmlns:local="clr-namespace:ownChat"
+             DispatcherUnhandledException="App_DispatcherUnhandledException"
              StartupUri="LoginMaske.xaml">
     <Application.Resources>
          

PrototypChat/App.xaml.cs

@@ -1,6 +1,14 @@
-namespace ownChat
+using System.Windows.Threading;
+
+namespace ownChat
 {
     public partial class App
     {
+        private void App_DispatcherUnhandledException(object sender, DispatcherUnhandledExceptionEventArgs args)
+        {
+            new ExceptionWindow(args.Exception) { Owner = MainWindow }.Show();
+
+            args.Handled = true;
+        }
     }
 }

PrototypChat/ExceptionWindow.xaml

@@ -0,0 +1,12 @@
+<Window x:Class="ownChat.ExceptionWindow"
+        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+        xmlns:chatController="clr-namespace:ChatController;assembly=ChatController"
+        mc:Ignorable="d" WindowStartupLocation="CenterOwner"
+        Title="Es ist ein Fehler aufgetreten" Height="450" Width="800">
+    <Grid>
+        <chatController:ExceptionViewControl x:Name="ExceptionViewControl" OkButtonClicked="ExceptionViewControl_OnOkButtonClicked" />
+    </Grid>
+</Window>

PrototypChat/ExceptionWindow.xaml.cs

@@ -0,0 +1,18 @@
+using System;
+
+namespace ownChat
+{
+    public partial class ExceptionWindow
+    {
+        public ExceptionWindow(Exception exception)
+        {
+            InitializeComponent();
+            ExceptionViewControl.Exception = exception;
+        }
+
+        private void ExceptionViewControl_OnOkButtonClicked(object sender, EventArgs e)
+        {
+            Close();
+        }
+    }
+}

PrototypChat/MainWindow.xaml.cs

@@ -17,6 +17,9 @@ namespace ownChat
         {
             InitializeComponent();
 
+            var currentDomain = AppDomain.CurrentDomain;
+            currentDomain.UnhandledException += ExceptionHandler;
+
             ChatMainControl.ContainingWindow = this;
 
             ChatMainControl.InitMitChatdaten(x);
@@ -24,6 +27,13 @@ namespace ownChat
             _EmojiView = new ChatEmojisView(ChatMainControl);
         }
 
+        private void ExceptionHandler(object sender, UnhandledExceptionEventArgs args)
+        {
+            var exception = (Exception)args.ExceptionObject;
+
+            new ExceptionWindow(exception) { Owner = this }.Show();
+        }
+
         private void ChatMainControl_OnOnEmojii(System.Windows.Controls.Button emojiButton)
         {
             _EmojiView.Visibility = Visibility.Visible;
@@ -31,11 +41,13 @@ namespace ownChat
             var pointToScreen = emojiButton.PointToScreen(new Point(0, 0));
             var presentationSource = PresentationSource.FromVisual(emojiButton);
 
-            if(presentationSource?.CompositionTarget != null)
+            if(presentationSource?.CompositionTarget == null)
             {
-                _EmojiView.Top = pointToScreen.Y / presentationSource.CompositionTarget.TransformToDevice.M22 - _EmojiView.Height - 5;
-                _EmojiView.Left = pointToScreen.X / presentationSource.CompositionTarget.TransformToDevice.M11 - 270;
+                return;
             }
+
+            _EmojiView.Top = pointToScreen.Y / presentationSource.CompositionTarget.TransformToDevice.M22 - _EmojiView.Height - 5;
+            _EmojiView.Left = pointToScreen.X / presentationSource.CompositionTarget.TransformToDevice.M11 - 270;
         }
 
         private void MainWindow_OnClosed(object sender, EventArgs e)

PrototypChat/PrototypChat.csproj

@@ -105,6 +105,10 @@
       <SubType>Designer</SubType>
       <Generator>MSBuild:Compile</Generator>
     </Page>
+    <Page Include="ExceptionWindow.xaml">
+      <SubType>Designer</SubType>
+      <Generator>MSBuild:Compile</Generator>
+    </Page>
     <Page Include="LoginMaske.xaml">
       <SubType>Designer</SubType>
       <Generator>MSBuild:Compile</Generator>
@@ -117,6 +121,9 @@
       <DependentUpon>App.xaml</DependentUpon>
       <SubType>Code</SubType>
     </Compile>
+    <Compile Include="ExceptionWindow.xaml.cs">
+      <DependentUpon>ExceptionWindow.xaml</DependentUpon>
+    </Compile>
     <Compile Include="LoginMaske.xaml.cs">
       <DependentUpon>LoginMaske.xaml</DependentUpon>
     </Compile>